I an right handed and left eye dominant. I also have esophoria, meaning I am a little bit cross eyed. Makes shooting with both eyes open a little challenging, as I see two pictures.

As to using both hands, when I was a very young machinist apprentice running an engine lathe, I was tending to use my right hand for all cranking. My boss walked up to me one day after seeing that and said, "Son, God gave you two hands, and if you're gonna make a living in this business, you need to learn to use them both.

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Robert
SWCA #2906, SWHF #760